Editor crashes after build on any platform

We've had this problem for a while, hoping it would get fixed in an update, but no luck. We've dragged it since the first Unity 5 until now 5.1.1p2.

Everytime I build, on iOS, Android, Windows, WebGL, or Webplayer (Which is what we're targetting) the editor crashes after the build is complete. The build is usually fine, but it's very annoying that Unity always disappears like that. It occurs both on OSX and Windows, on all the computers of our developers.

Here's the editor log Stacktrace

 ========== OUTPUTING STACK TRACE ==================
 
 000000014037DBF9 (Unity) BuildScriptClassId
 0000000140385195 (Unity) FindOrCreateMonoScriptCache
 0000000140376B26 (Unity) MonoBehaviour::SetupScriptingCache
 000000014037944C (Unity) MonoBehaviour::RebuildMonoInstance
 00000001405529F5 (Unity) MonoManager::RemoveBehavioursFromManager
 0000000140554279 (Unity) MonoManager::EndReloadAssembly
 0000000140556052 (Unity) MonoManager::ReloadAssembly
 00000001408C1A0A (Unity) ReloadAllUsedAssemblies
 0000000140D2920A (Unity) Application::LoadSceneInternal
 0000000140D2B3B9 (Unity) Application::EnterPlayMode
 0000000140D2BC33 (Unity) Application::SetIsPlaying
 0000000140D320C5 (Unity) Application::TickTimer
 0000000140E44774 (Unity) RelaunchUnity
 0000000140E45D6B (Unity) WinMain
 00000001414D68E0 (Unity) strerror_s
 0000000076C859CD (kernel32) BaseThreadInitThunk
 0000000076EBB981 (ntdll) RtlUserThreadStart
 
 ========== END OF STACKTRACE ===========

This is where it actually crashes, it's alwas right after an error that says "did not release all crashes".

 ReleaseAllScriptCaches did not release all script caches!
  
 (Filename: C:/buildslave/unity/build/Runtime/Mono/MonoManager.cpp Line: 1427)
 
 Remaining caches:
     Assembly-CSharp-Editor:GitMerge:Resources
 Crash!!!